Cashew nut process wastewater treatment technologies?

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Dear colleagues,

I am making a thesis in cashew nut process wastewater treatment for small scale (5 m3/h). The treatment technologies I proposed is: 

Cashew process wastewater -> Trask screen -> Grease removal tank - > EQ tank -> Flocculation -> Coagulation -> Lamen settling tank -> sand filter -> storage tank -> discharge.

Any brother has experience in this case, Kindly help to give ma advice for this technology.

Thank brothers,

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10 Answers

  1. Electro-coagulation is the best technology for removal of fat, oil& grease. The BOD and COD removal will be around 70% in the process. If you use biological process, the food to the bacteria will be more and it is very difficult to maintain the bacteria in the biological process, the effluent will be naturally acidic due this can be dangerous to the bacteria. If you can provide us the discharge parameters, we can help with the exact scheme for the safe discharge.

  2. The degree of treatment required depends on the discharge  standards you are required to comply with, as well as on the characteristics of the wastewater one is treating. The flowsheet you describe, if properly sized and operated, should be effective in removing total suspended solids as well as associated organic matter (BOD/COD). Not knowing the composition of the influent, it is difficult to know if what you are proposing is optimal or not. If removal of suspended solids is all that is required, your system will probably do the trick. However, if there is significant dissolved BOD or COD that has to be removed, you should be looking at biological treatment. Given the nutrients present in cashews, wastewater will probably be highly biodegradable.  Test the effluent for total and dissolved COD, compare with the requirements you need to attain and you will see if additional treatment is needed.

  3. we may help you see  www.lyom-water.com 

  4. Could you please elaborate on the nature and type of the effluent from the cashew nut process ?

    If you can provide the characteristics of the raw effluent then it will be easier to figure out the treatment chain required. 

     

  6. Please confirm water qty. per Day and where do you want to discharge ? we can offer re use of water to reduce fresh water intake.  Most economical sustainable solution.  Amdy.  mtplimited@gmail.com

  7. Hi

    do you have an analysis of the wastewater?

    what are the land constrains ?

    you may use sedimentation followed by a wetland

    good luck

    ilan

    Answered on by

  8. For cashew nut process, it would be ideal to use bio -remediation for process for  both solids and liquids wastes.

    If chemicals are used it could be neutralised by bio chemicals viz. Acetic acid or cooking soda.. As phyto remediation process is a must, the plants would take care of the remediation process.

    All solids would be bio-origin can be composted in the finishing stage use of worms is encouraged.

    Well wishes for an eco friendly process..

  9. Hi Tom, Baleen is best utilised after the Trash Screen for optimum wash water recycle opportunity (for dramatic load reduction and water savings prior to treatment/disposal)... Happy to explore further with you via yuri at baleen dot com Regards, Yuri